Bob Kaiser
Pitcher · Career Stats, Bio & Records (1971)
Bob Kaiser was a pitcher who played in Major League Baseball in 1971 for the Cleveland Guardians. Across 5 career appearances, he went 0-0 with a 4.50 ERA and 4 strikeouts.
- W (Wins):
- Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
- ERA (Earned Run Average):
- Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
- SO (Strikeouts):
- For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
- WHIP (Walks and Hits per Inning Pitched):
- Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.
Data updated
- Position
- Pitcher
- Bats / Throws
- B / L
- Height / Weight
- 5'10" / 175 lb
- MLB Debut
- 1971-09-03
- Last Game
- 1971-09-18
Full name: Robert Thomas Kaiser
Season-by-Season Pitching
Click a stat to plot it across every season.
| Year | Team | Lg | W | L | G | GS | CG | SHO | SV | IP | H | ER | BB | SO | ERA | Lg ERA | Pitcher PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1971 | CLE | AL | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 6.0 | 8 | 3 | 3 | 4 | 4.50 | — | 0.0 |
| Career · 1 season | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 6.0 | 8 | 3 | 3 | 4 | 4.50 | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Season-by-Season Batting
Click a stat to plot it across every season.
| Year | Team | Lg | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | Lg AVG | Lg OBP | Lg SLG | Lg OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1971 | CLE | AL | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 1 season | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Game Log & Splits
View full game log (10 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 2 | 0 | 0 | 0 | 0 | 0 | — |
| Away | 3 | 0 | 0 | 0 | 0 | 0 | — |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 2 | 2.0 | 3 | 1 | 0 | 0 | 4.50 |
| Away | 3 | 4.0 | 5 | 2 | 3 | 4 | 4.50 |
Last 5 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 1971-09-18 | CLE | NYY | — | 2.0 | 2 | 0 | 0 | 1 | 2 | 0 |
| 1971-09-17 | CLE | NYY | — | 1.0 | 1 | 1 | 1 | 2 | 0 | 0 |
| 1971-09-16 | CLE | BOS | — | 1.0 | 2 | 1 | 1 | 0 | 0 | 1 |
| 1971-09-11 | CLE | NYY | — | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1971-09-03 | CLE | BOS | — | 1.0 | 2 | 1 | 1 | 0 | 2 | 1 |
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 5 |
Bob Kaiser: the record in brief
Between the debut on September 3, 1971 and the final game on September 18, 1971, Bob Kaiser built the record summarized on this page. All of the seasons listed were played for the Cleveland Indians. The bio lists Kaiser as a pitcher who batted from both sides and threw left-handed. The recorded size is 175 pounds on a 5-foot-10 frame. The birth record reads April 29, 1950, in Cincinnati, OH, USA. Bob Kaiser was the playing name; the full given name is Robert Thomas.
The pitching table credits Kaiser with a 0-0 record and a 4.50 ERA in 5 games. The totals include 4 strikeouts. The league ERA over Kaiser's seasons was 3.47, so the 4.50 figure ran 29.7% worse than average. All of that pitching came in 1971, with 5 games and 4 strikeouts.
Every defensive appearance on record for Kaiser, 5 games, came at pitcher.
Kaiser's game-by-game log, linked below the splits, holds 10 games from Retrosheet.
Frequently Asked Questions about Bob Kaiser
- Was Bob Kaiser a pitcher?
- Yes. Bob Kaiser pitched in the major leagues, recording 0 wins and 4 strikeouts.
- What was Bob Kaiser's career ERA?
- Bob Kaiser finished with a 4.50 career ERA, going 0-0 with 4 strikeouts.
- How many strikeouts did Bob Kaiser have?
- Bob Kaiser recorded 4 career strikeouts.
- Is Bob Kaiser in the Hall of Fame?
- No. Bob Kaiser has not been inducted into the National Baseball Hall of Fame.
- What teams did Bob Kaiser play for?
- Bob Kaiser played for the Cleveland Guardians.